Fix markdown mention chips

Co-Authored-By: Paperclip <noreply@paperclip.ing>

packages/shared/src/project-mentions.test.ts

@@ -0,0 +1,29 @@
+import { describe, expect, it } from "vitest";
+import {
+  buildAgentMentionHref,
+  buildProjectMentionHref,
+  extractAgentMentionIds,
+  extractProjectMentionIds,
+  parseAgentMentionHref,
+  parseProjectMentionHref,
+} from "./project-mentions.js";
+
+describe("project-mentions", () => {
+  it("round-trips project mentions with color metadata", () => {
+    const href = buildProjectMentionHref("project-123", "#336699");
+    expect(parseProjectMentionHref(href)).toEqual({
+      projectId: "project-123",
+      color: "#336699",
+    });
+    expect(extractProjectMentionIds(`[@Paperclip App](${href})`)).toEqual(["project-123"]);
+  });
+
+  it("round-trips agent mentions with icon metadata", () => {
+    const href = buildAgentMentionHref("agent-123", "code");
+    expect(parseAgentMentionHref(href)).toEqual({
+      agentId: "agent-123",
+      icon: "code",
+    });
+    expect(extractAgentMentionIds(`[@CodexCoder](${href})`)).toEqual(["agent-123"]);
+  });
+});